Transaction not yet indexed

Why1QR9ZUyk8ngtvh6QTwT6LAfgk3XZcRTQU8XU5YNSQZsLFusbJzgcvGPUDbWbXsFS7hwnkTPKjhJK9MP6Rp89

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.